John Breed, Diary and Training diary, item 123

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 Drawing of different trajectories, labeled A, a, b, c 


Now if we take any given distance, say 50 yards, as the

correct distance short, and if in figures we measure up

to 50 yards along the trajectory at a number of different

ranges, to the points a, b, and c we shall find that these

points, as seen from the gun are practically in the same

straight line. If therefore we measure the angle A, and 

find it to be say 15 minutes then if we elevate the sighting

telescope or director telescope 15 minutes above the target

any bursts which appear on the cross wires will be the

correct distance from the target.

In fixing the proper distance of the burst, and thence

the angle A for any gun, regard must also be had

to the mean error of the fuze.

This subject involves the Theory of Probabilities and cannot

be adequately dealt with in the present work. But it is

clear that if shrapnel fuzed alike burst at a distance

varying by a  [sic]  much as 150 yards, a good many of the

Transcription saved

 Drawing of different trajectories, labeled A, a, b, c 


Now if we take any given distance, say 50 yards, as the

correct distance short, and if in figures we measure up

to 50 yards along the trajectory at a number of different

ranges, to the points a, b, and c we shall find that these

points, as seen from the gun are practically in the same

straight line. If therefore we measure the angle A, and 

find it to be say 15 minutes then if we elevate the sighting

telescope or director telescope 15 minutes above the target

any bursts which appear on the cross wires will be the

correct distance from the target.

In fixing the proper distance of the burst, and thence

the angle A for any gun, regard must also be had

to the mean error of the fuze.

This subject involves the Theory of Probabilities and cannot

be adequately dealt with in the present work. But it is

clear that if shrapnel fuzed alike burst at a distance

varying by a  [sic]  much as 150 yards, a good many of the


Transcription history
  • March 29, 2017 23:07:02 Cheryl Ellsworth

     Drawing of different trajectories, labeled A, a, b, c 


    Now if we take any given distance, say 50 yards, as the

    correct distance short, and if in figures we measure up

    to 50 yards along the trajectory at a number of different

    ranges, to the points a, b, and c we shall find that these

    points, as seen from the gun are practically in the same

    straight line. If therefore we measure the angle A, and 

    find it to be say 15 minutes then if we elevate the sighting

    telescope or director telescope 15 minutes above the target

    any bursts which appear on the cross wires will be the

    correct distance from the target.

    In fixing the proper distance of the burst, and thence

    the angle A for any gun, regard must also be had

    to the mean error of the fuze.

    This subject involves the Theory of Probabilities and cannot

    be adequately dealt with in the present work. But it is

    clear that if shrapnel fuzed alike burst at a distance

    varying by a  [sic]  much as 150 yards, a good many of the

  • March 29, 2017 21:28:56 Cheryl Ellsworth

     Drawing of different trajectories, labeled A, a, b, c 


    Now if we take any given distance, say 50 yards, as the

    correct distance short, and if in figures we measure up

    to 50 yards along the trajectory at a number of different

    ranges, to the points a, b, and c we shall find that these

    points, as seen from the gun are practically in the same

    straight line. If therefore we measure the angle A, and 

    find it to be say 15 minutes then if we elevate the sighting

    telescope or director telescope 15 minutes above the target

    any bursts which appear on the cross wires will be the

    correct distance from the target.

    In fixing the proper distance of the burst, and thence

    the angle A for any gun, regard must also be had

    to the mean error of the fuze.

    This subject involves the Theory of Probabilities and cannot

    be adequately dealt with in the present work. But it is

    clear that if shrapnel fuzed alike burst at a distance

    varying by a  [sic]  much as 150 yards, a good many of the


  • March 29, 2017 21:28:36 Cheryl Ellsworth

     Drawing of different trajectories, labeled A, a, b, c 


    Now if we take any given distance, say 50 yards, as the

    correct distance short, and if in figures we measure up

    to 50 yards along the trajectory at a number of different

    ranges, to the points a, b, and c we shall find that these

    points, as seen from the gun are practically in the same

    straight line. If therefore we measure the angle A, and 

    find it to be say 15 minutes then if we elevate the sighting

    telescope or director telescope 15 minutes above the target

    any bursts which appear on the cross wires will be the

    correct distance from the target.

    In fixing the proper distance of the burst, and thence

    the angle A for any gun, regard must also be had

    to the mean error of the fuze.

    This subject involves the Theory of Probabilities and cannot

    be adequately dealt with in the present work. But it is

    clear that if shrapnel fuzed alike burst at a distance

    varying by a [sic] much as 150 yards, a good many of the


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    ID
    17035 / 198362
    Source
    http://europeana1914-1918.eu/...
    Contributor
    Mrs Jean Hanby
    License
    http://creativecommons.org/licenses/by-sa/3.0/



    • Western Front

    • Artillery
    • Trench Life



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